I know there is ROM that can boot the switch or router without an IOS to ROMMON prompt. Can that ROM be upgraded? I assume not because of the name of "Read Only Memory"
Is the bootloader part of the IOS? If so then why is the version number different than the IOS? Can the bootloader be updated by itself?
I understand the boot system command but I am curious why different version numbers between bootldr and IOS?
Cisco IOS Software, C3750 Software (C3750-IPSERVICESK9-M), Version 12.2(53)SE1, RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2010 by Cisco Systems, Inc.
Compiled Fri 12-Mar-10 15:50 by prod_rel_team
Image text-base: 0x01000000, data-base: 0x02F00000
ROM: Bootstrap program is C3750 boot loader
BOOTLDR: C3750 Boot Loader (C3750-HBOOT-M) Version 12.2(44)SE5, RELEASE SOFTWARE (fc1)
switch1 uptime is 13 weeks, 6 days, 12 hours, 52 minutes
System returned to ROM by power-on
System restarted at 20:12:53 PDT Tue Sep 2 2011
System image file is "flash:c3750-ipservicesk9-
This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.
A summary of U.S. laws governing Cisco cryptographic products may be found at:
If you require further assistance please contact us by sending email to
cisco WS-C3750G-12S (PowerPC405) processor (revision N0) with 131072K bytes of memory.
Processor board ID xxxxxxxxxxx
Last reset from power-on
2 Virtual Ethernet interfaces
12 Gigabit Ethernet interfaces
The password-recovery mechanism is enabled.
512K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address : xx:xx:xx:xx:xx:xx
Motherboard assembly number : 73-9678-05
Power supply part number : 341-0048-03
Motherboard serial number : xxxxxxxxxxxx
Power supply serial number : xxxxxxxxxxxx
Model revision number : N0
Motherboard revision number : A0
Model number : WS-C3750G-12S-E
System serial number : xxxxxxxxxxxxxx
Top Assembly Part Number : 800-26634-02
Top Assembly Revision Number : C0
Version ID : V04
CLEI Code Number : CNM8ZW0GRB
Hardware Board Revision Number : 0x06
Switch Ports Model SW Version SW Image
------ ----- ----- ---------- ----------
* 1 12 WS-C3750G-12S 12.2(53)SE1 C3750-IPSERVICESK9-M
Configuration register is 0xF